I hope you choose to update the movement in this game. It is a nice little game. I enjoyed playing and it has a bunch of potential. With an exploration game like this, it is very important to be able to direct the player fast and accurately.
I think the inventory could have been displayed directly in the HUD. Of coarse ,if you have plans on adding more items to the inventory, then it would make sense to has it as its own screen.
Adding some 8bit audio would be a nice touch and add to the whole exploration feel of the game.
I get a feeling that you had fun creating this and I sure hope you keep at it. It has a lot potential!
I'd love to get your feedback on my game.